What rule of inference is used in the argument “Jerry is a mathematics major and a computer science major. Therefore, Jerry is a mathematics major.” ( )
Addition
B. Simplification
Conjunction
D. Resolution
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The integers in set {11, 15, 19} are pairwise relatively prime.( )
The integers in set {14, 15, 21} are pairwise relatively prime.( )
The integers in set {12, 17, 31, 37} are pairwise relatively prime.( )
The integers in set {7, 8, 9, 11} are pairwise relatively prime.( )
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